* gcc.c (driver_handle_option): Fix disabling of -fcompare-debug.

From-SVN: r174492

gcc/ChangeLog

 2011-05-31  Alexandre Oliva  <aoliva@redhat.com>
 
+	* gcc.c (driver_handle_option): Fix disabling of -fcompare-debug.
+
+2011-05-31  Alexandre Oliva  <aoliva@redhat.com>
+
 	* gengtype-state.c (read_state_params_structs): Initialize
 	previous.
 

gcc/gcc.c

@@ -3277,7 +3277,7 @@ driver_handle_option (struct gcc_options *opts,
     compare_debug_with_arg:
       gcc_assert (decoded->canonical_option_num_elements == 1);
       gcc_assert (arg != NULL);
-      if (arg)
+      if (*arg)
 	compare_debug = 1;
       else
 	compare_debug = -1;